en_tn_condensed/mat/10/33.md

he who denies me ... I will also deny before my Father

"whoever denies me ... I will also deny before my Father" or "if anyone denies me ... I will also deny him before my Father"

denies me before men

"denies to other people that he is loyal to me" or "refuses to acknowledge to others that he is my disciple"

I will also deny before my Father who is in heaven

You can make explicit the information that is understood. Alternate translation: "I will deny before my Father who is in heaven that this person belongs to me" (See: rc://en/ta/man/translate/figs-explicit)